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Finding the Fourth Proportional to 128,292.08, 192,306.90 and 64,994.90

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Solution

The fourth proportional to 128,292.08, 192,306.90 and 64,994.90 is: 97,425.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,292.08 : 192,306.90 = 64,994.90 : x
  2. Step 2: Convert to fraction form
    128,292.08/192,306.90 = 64,994.90/x
  3. Step 3: Cross multiply
    128,292.08x = 192,306.90 × 64,994.90
  4. Step 4: Simplify right side
    128,292.08x = 12,498,967,734.81
  5. Step 5: Solve for x
    x = 12,498,967,734.81/128,292.08
  6. Step 6: Final answer
    x = 97,425.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.